| Boku no Natsuyasumi 3 | |
| Developer: | Millennium Kitchen |
| Publisher: | Sony Computer Entertainment |
| Genre: | Adventure |
| Modes: | Single-player |
| Platforms: | PlayStation 3 |
is a 2007 adventure video game developed by Millennium Kitchen and published by Sony Computer Entertainment for the PlayStation 3. It is part of the Boku no Natsuyasumi series and was released only in Japan on July 5, 2007.
The game involves a boy's summer vacation on his aunt and uncle's farm in the wide-open countryside of HokkaidÅ. Features from previous series entries, like catching a large variety of insects, a popular pastime in Japan, and swimming return, along with new activities, such as grass sledding, cow milking, and Chinese jump rope.